its not about brand choice. its about what head will be best for the setup. the 2 blade will use less force to penetrate then the 3 blade thunderhead. also if heavier bone is hit the 2 blade will penetrate better threw it. if it was me i would 100% go to a 2 blade head/ bleeders are o.k. but not use a 3 blade head on any bow under 55lbs.
best thing to do is weight it on a scale to know the weight any pro shop should have one. or a reloader you might know as well.